Reznor RDH with 1-stage gas control or 2-stage gas control Gas Conversion Kit Instructions - Manual (Page 4)

Form CP-PREEVA-GC, P/N 212063 R7, Page 4
FIGURE 2B -
Location of Holding
Tabs on the Air
Restrictor Plate used
on Sizes 75, 100,
125, 150, and 175.
Restrictor plate is
used ONLY when
burning propane on
the sizes listed.
To install, slide the restrictor in place so that the
45° angle is hooked over the rear of the venturi
tube.
On the front of the venturi tube, bend the two
tabs as shown to hold the restrictor in place.
To remove, carefully unbend tabs.
Select and follow instructions in appropriate section in
Step 4C. To install or remove air restrictor plate follow
instructions below.
4C. Install Orifice (All Sizes) and Install or Remove Air Restrictor Plate (Sizes 75, 100, 125, 150, 175)
Natural Gas TO Propane - Applies to Sizes 75, 100, 125, 150, 175
1) Refer to FIGURE 2A and locate the gas orifice. Carefully remove the natural gas orifice.
2) Install the air restrictor plate. Slide the air restrictor plate over the venturi opening, positioning as illustrated in
FIGURE 2A.
3) Refer to FIGURE 2B. Holding the air restrictor plate in position, use a pair of pliers to bend the tabs to “lock”
the air restrictor plate to the venturi tube. Be sure air restrictor is aligned and secure.
4) Install the propane orifice selected for the heater in Step 4A, page 3.
Propane TO Natural Gas - Applies to Sizes 75, 100, 125, 150, 175
1) Refer to FIGURES 1 and 2A and locate the gas orifice. Carefully remove the propane gas orifice.
2) Refer to FIGURES 2A and 2B and locate the air restrictor plate on the venturi tube. Using a pair of pliers, very
carefully unbend the tabs and remove the air restrictor plate.
3) Install the natural gas orifice selected for the heater in Step 4A, page 3.
Natural Gas to Propane OR Propane to Natural - Applies to Sizes 200, 225, 250, 300, 350, 400A
1) Refer to FIGURES 1 and 2A and locate the gas orifice. Carefully remove the gas orifice.
2) Install the orifice selected for the heater in Step 4A, page 3.
Gas Conversion
Instructions
(cont’d)
FIGURE 3 -
Install High
Altitude
Pressure
Switch
required above
6000 ft (1830M)
elevation
Instructions for Changing the Pressure Switch
1. In the control compartment, locate the pressure switch.
2. Mark and disconnect the two wires attached to the pressure switch.
3. Disconnect the sensing tube(s) from the pressure switch.
4. Locate the two screws holding the switch mounting bracket.
Remove the screws (save screws) and the pressure switch.
5. Using the same screws, install the correct pressure switch. Attach
the sensing tube(s) and wires.
Pressure
Switch
NOTE: If elevation is above 6000 ft (1830M), the unit being converted requires a
high altitude pressure switch. When ordered with Option AB6, AB7, or AB8, the unit is
factory-equipped with a high altitude pressure switch. Verify on the rating plate whether
or not the unit was ordered for above 6000 ft (1830M).
If the unit was not ordered for operation above 6000 ft (1830M) but will be operated
above 6000 ft (1830M) and has a single-stage or two-stage gas control, contact your
distributor to obtain a replacement switch. Follow the instructions below to install the
high altitude pressure switch before starting the heater.
( NOTE: Conversely, if the rating plate does indicate that the unit is equipped for opera-
tion above 6000ft (1830M) and the installation is below that elevation, contact your
distributor to obtain the appropriate pressure switch.)
Operation Above an
Elevation of 6000 ft
(1830M)
WARNING
Sizes 75, 100, 125, 150, and 175 - Failure to install or remove air restrictor plate according to
directions could cause property damage, personal injury, and/or death.
• Air restrictor plate MUST be added when converting sizes listed to propane. See
FIGURES 2A & 2B and the instructions in Step 4C.
• Air restrictor plate MUST be removed when converting to natural gas. See
FIGURES 2A & 2B and the instructions in Step 4C.